"It's a very intense feeling I have for them," Rowling said of her connection to the three actors. "Because they have literally lived in my world, and they've done it such honor, and because they have been so magnificent in the way they have grown up and played their parts, and it just so happens, which is the most important thing of all, that they are three fantastic people.

"You'd go a long way to find three brighter, nicer, more grounded people than Dan, Rupert, and Emma."

Praising them individually, Rowling went on to describe Watson as "the poster girl for clever girls", adding that the actress showed that Hermione can do "more than just be the nerd" alongside Harry and Ron.

The author, who is credited as a producer on both parts of Deathly Hallows, also offered her thoughts on the final adaptation.

"There's a huge amount of action in this; it's a war movie, actually," Rowling explained. "Part 1 is a road movie; Part 2's a war movie, with everything that implies. It's incredibly sad in places, it's very exciting in places, and I feel that all of the major characters have sublime moments.

"What I always mentally refer to as the big seven - Harry, Ron, Hermione, Ginny, Neville, Luna and Draco - all of them have fantastic moments in this final, cathartic battle. You can probably tell I love it. I think it's probably the best."